MARTINEZ -- In his final act of public service, slain California Highway Patrol Officer Kenyon Youngstrom donated his organs and body tissue, an act that could save the lives of up to eight people and aid 50 more, officials said Thursday.

The news came Thursday morning as a memorial was being planned, donation accounts set up for Youngstrom's widow and four children, and investigators updated details surrounding Tuesday's shooting on Interstate 680 near Alamo.

In a statement released through the Oakland-based nonprofit California Transplant Donor Network, Youngstrom's family called him "our hero."

"Our grief is overwhelming. But in his special way, Kenyon carries on in helping others," the family said. "This was our Kenyon, he's our hero and, in the midst of our grief, we are comforted to know he continues to help others."

About 40 percent of California licensed drivers are registered organ donors and about 10,000 Northern California residents are in need of an organ to save their lives, network spokesman Anthony Borders said.

"The officer's life was about giving to people and caring for the public and with his wish to be an organ donor he's continuing that legacy," he said.

Accounts have been set up at Mechanics Bank and Wells Fargo for donations to Youngstrom's family.

Donations can be made to the Officer Youngstrom Memorial Fund Account at any Mechanics Bank branch using account number 041710126, CHP spokeswoman Jaime Coffee said. For wire transfers, the bank's routing number is 121102036.

The Wells Fargo account has been set up as the "Kenyon Marc Youngstrom Children's Benefit Memorial Fund."

Meanwhile, flags were flown at half-staff at the Martinez CHP station and across California Thursday as authorities released an updated description of the Tuesday shooting that left Youngstrom dead.

A seven-year CHP veteran, Youngstrom died less than 36 hours after a suspect shot him in the head during a traffic stop on the southbound shoulder of I-680 near Alamo.

Youngstrom, 37, had already pulled to the side of the road, tending to a dead deer there, when Youngstrom's partner pulled over suspect Christopher Boone Lacy, 36, authorities said. It was shortly before 8:30 a.m. when Lacy pulled his Jeep up behind Youngstrom's already-stopped patrol car, with another CHP officer pulling up behind Lacy to conduct the traffic stop.

Youngstrom, already out of his own car, guided Lacy's car to a stop and walked up to Lacy's driver's side window to speak to him, sheriff's spokesman Jimmy Lee said. The two exchanged words for just a few seconds before Lacy, without warning, draw a semi-automatic handgun and shot Youngstrom in the head, Lee said.

The second CHP officer, Youngstrom's partner, then approached Lacy's Jeep from behind on the passenger side and fired numerous shots into the vehicle, killing Lacy, Lee said.

The entire incident, from the time Lacy was pulled over to the time he was shot by the second officer, had taken less than a minute, and closer to 30 seconds, Lee said.

No other details about the investigation were expected to be released Thursday, Lee said.

Throughout the morning and early afternoon Thursday, CHP organizers and Youngstrom's family were meeting to sort out details of a public memorial service for the slain officer, CHP Sgt. Diana McDermott said.

A bell-ringing ceremony in Youngstrom's honor was planned for 5 p.m. at the CHP academy in West Sacramento, to be led by CHP Commissioner Joe Farrow, his office announced.

Meanwhile, a Facebook page calling for that stretch of I-680 to be named after Youngstrom had gained the support of more than 3,800 users by 1:45 p.m.